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The experimental results showed that:1) The embryonic development of bay scallop is inhibited ata dissolved oxygen range of 1.38-3.64×10~(-3)at 23℃,and completely blocked below the lower limit.2)The tolerance of larvae to anoxia increased with larval sizes and was related to their oxygen debt.3)The scallop larvae exhibited specific behavioral responses to oxygen deficiency,which finally led tovelum disintegration and larval death.The possible relationship between environmental oxygen deficien-cy and the disease of disintegration of the larval Velum is also discussed.In this study,considerableoxygen debt was found in bay scallop larvae,which was greater in small animals.Based on the worksof previous authors,a new concept is proposed for the estimation of oxygen debt,namely,thecompensatory rate of oxygen debt(CROD).This can be used in intra-or interspecific comparison ofoxygen debt.The results can be helpful in the management of water quality and for the prevention oflarval diseases encountered in scallo 相似文献
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The experimental results showed that: 1) The embryonic development of bay scallop is inhibited at a dissolved oxygen range
of 1.38–3.64×10−3 at 23°C, and completely blocked below the lower limit. 2) The tolerance of larvae to anoxia increased with larval sizes and
was related to their oxygen debt. 3) The scallop larvae exhibited specific behavioral responses to oxygen deficiency, which
finally led to velum disintegration and larval death. The possible relationship between environmental oxygen deficiency and
the disease of disintegration of the larval velum is also discussed. In this study, considerable oxygen debt was found in
bay scallop larvae, which was greater in small animals. Based on the works of previous authors, a new concept is proposed
for the estimation of oxygen debt, namely, the compensatory rate of oxygen debt (CROD). This can be used in intra—or interspecific
comparison of oxygen debt. The results can be helpful in the management of water quality and for the prevention of larval
diseases encountered in scallop culture.
Contribution No. 2167 from the Institute of Oceanology, Chinese Academy of Sciences. 相似文献
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